From: Chris Hoover <chrish@aweber.com>
To: Ozgur Kulu <kuluozgur@gmail.com>
Cc: pgsql-admin@lists.postgresql.org
Subject: Re: Outage caused by query in IPC:MessageQueueReceive wait????
Date: Fri, 14 Jun 2024 14:19:06 -0400
Message-ID: <464C0807-4299-42B4-81E8-AC8D016C3AC7@aweber.com> (raw)
In-Reply-To: <CAF5PJVzhHAz1F55-xW_rNUYOZCBr2TYUtt0xpYAeTd+q7wA09w@mail.gmail.com>
References: <A2F12A32-848A-4540-A34B-0E2431ACC88A@aweber.com>
<33F68D47-1D2D-4DB8-B753-BE83A3FA653E@aweber.com>
<CAF5PJVzhHAz1F55-xW_rNUYOZCBr2TYUtt0xpYAeTd+q7wA09w@mail.gmail.com>
Yes, it appeared to be in a transaction. The pg_stat_activity.xact_start was before the query_start. Unfortunately, I don’t have the other queries. (I snapshot pg_stat_activity every minute, so it missed any prior queries to the blocker).
Thanks,
Chris Hoover
Senior DBA
AWeber.com
Cell: (803) 528-2269
Email: chrish@aweber.com
> On Jun 14, 2024, at 2:16 PM, Ozgur Kulu <kuluozgur@gmail.com> wrote:
>
> Hi chris,
>
> Is this query in transaction block ?
>
> 14 Haz 2024 Cum 20:03 tarihinde Chris Hoover <chrish@aweber.com <mailto:chrish@aweber.com>> şunu yazdı:
>> Forgot to mention, this is on PG 16.1
>>
>> Thanks,
>>
>>
>> Chris Hoover
>> Senior DBA
>> AWeber.com
>> Cell: (803) 528-2269
>> Email: chrish@aweber.com <mailto:chrish@aweber.com>
>>
>>
>>
>>> On Jun 14, 2024, at 12:52 PM, Chris Hoover <chrish@aweber.com <mailto:chrish@aweber.com>> wrote:
>>>
>>> All,
>>>
>>> We had an outage today that appears to have been caused by a query in "IPC:MessageQueueReceive” wait state blocking another query from completing a truncate.
>>>
>>> Is there anyway to figure out what exactly it was waiting on other than an IPC message? I’m trying to get to the true root cause of our outage.
>>>
>>> Thanks,
>>>
>>>
>>> Chris Hoover
>>> Senior DBA
>>> AWeber.com
>>> Cell: (803) 528-2269
>>> Email: chrish@aweber.com <mailto:chrish@aweber.com>
>>>
>>>
>>>
>>
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To: pgsql-admin@postgresql.org
Cc: chrish@aweber.com, kuluozgur@gmail.com, pgsql-admin@lists.postgresql.org
Subject: Re: Outage caused by query in IPC:MessageQueueReceive wait????
In-Reply-To: <464C0807-4299-42B4-81E8-AC8D016C3AC7@aweber.com>
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